Re: VLF: IW4DXW 8270.003 Hz

[Riccardo Zoli <riccardozoli80@gmail.com>]

Hi Stefan,

Congratulations! It was less of 10 μW.

Thanks for your efforts to decode me. And thanks again to Paul.

The experiment will be portable with a very simple equipment: a 12V 60Ah lead-acid battery (pretty heavy, but i'm considering to buy a LiFePO4 battery pack) and a 200W car audio PA with input connected to a FM RX (QRG in the 70 cm band, no WLAN audio streaming and stuff).

400 meters away, at home, I have the FM TX (500 mW or less) modulated by the PC audio. The feedback for Spectrum Lab will be taken from a little loop (or my main antenna). Do you think that would work?

Tomorrow, wx permitting, I'll measure the impedance of the ground loop.

73 de Riccardo IW4DXW

Il Sab 6 Ott 2018, 17:09 DK7FC <selberdenken@posteo.de> ha scritto:

Hi Riccardo,

I also got your 06:30 transmission:

found rank 0 ber 3.9497e-01 Eb/N0 0.9 M -1.385156938e-04 ph 5 150,150,150,150 [IW4DXW]
carrier phase: -3.4 deg
carrier Eb/N0: 0.9 dB
carrier Es/N0: -14.36 dB
carrier S/N: 16.25 dB in 43.4 uHz, -27.37 dB in 1Hz, -61.35 dB in 2.5kHz

73, Stefan



Am 05.10.2018 08:13, schrieb Riccardo Zoli:

A new transmission is starting at 06:30 UTC.

73 de Riccardo IW4DXW

Il Gio 4 Ott 2018, 21:43 Riccardo Zoli <riccardozoli80@gmail.com> ha scritto:

Ok, Stefan, thanks. I'm ready:

Start at 00:00 UTC (5 Oct)

Coding 16K21A

CRC 16

20 sec/sym

6 char

Duration 6 h, 24 min

...hoping the noise remains low.

73, Riccardo IW4DXW